KPSC KAS Prelims and Mains Exam
Whether an animal will become a male, a female, or a hermaphrodite is determined very early in development. Scientists have worked for hundreds of years to understand the sex-determination system. The first major breakthrough in understanding sex determination was the discovery of sex chromosomes in the early 1900s. From meticulous analyses of male and … Read more
THEORIES OF EVOLUTION Evolution, simply put, is descent with modification. This definition encompasses small-scale evolution (changes in gene frequency in a population from one generation to the next) and large-scale evolution (the descent of different species from a common ancestor over many generations). Evolution helps us to understand the history of life. Evolution is not … Read more
DNA: STRUCTURE DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms. Nearly every cell in a person’s body has the same DNA. Most DNA is located in the cell nucleus (where it is called nuclear DNA), but a small amount of DNA can also be found in the … Read more
HORMONES Hormones are chemical messengers that are secreted directly into the blood, which carries them to organs and tissues of the body to exert their functions. There are many types of hormones that act on different aspects of bodily functions and processes. Some of these include: Development and growth Metabolism of food items Sexual function … Read more
ENZYMES Enzyme, a substance that acts as a catalyst in living organisms, regulating the rate at which chemical reactions proceed without itself being altered in the process. The biological processes that occur within all living organisms are chemical reactions, and most are regulated by enzymes. Without enzymes, many of these reactions would not take place … Read more
Section-I, Role and Impact of Science and Technology in Development of Indian, Information Technology In Public Domain 1. Basics of Science and Technology. Classical and emerging areas of science and Technology (S&T)- Value Addition by Science & Technology- Current Science & Technology developments in India and Importance of Science & Technology as an engine … Read more
ADifferent agro-climatic zones of Jharkhand, rain fall pattern and known abiotic stresses in each zone. Three Agro-Climatic zones of Jharkhand are: Western Plateau Zone Central and North Eastern Plateau Zone South Eastern Plateau Zone Agro-Climatic Zone of Jharkhand Region Name Districts Name Western Plateau Zone Bokaro Latehar Lohardanga Gumla Hazaribagh Palamau Ranchi Simdega Chatara … Read more
Each organism is different from other organisms. The total number of species living on the planet is imprecisely known and published estimates vary from 12 million to over 100 million. This is because there are large numbers of species yet undiscovered and undescribed, and there is not always agreement on whether certain organisms should … Read more